WO2004097267A1

WO2004097267A1 - Parking device for motor vehicle

Info

Publication number: WO2004097267A1
Application number: PCT/JP2004/005553
Authority: WO
Inventors: Yasushi Yamamoto
Original assignee: Isuzu Motors Limited
Priority date: 2003-04-25
Filing date: 2004-04-19
Publication date: 2004-11-11
Also published as: JP4506097B2; JP2004322883A; US7152723B2; EP1619423B1; CN100400941C; EP1619423A4; EP1619423A1; US20050236251A1; CN1701193A

Abstract

A parking device for a motor vehicle where frictional force of an engine cannot stop the rotation of an input shaft of a speed changer during the stop of the engine. The parking device has a parking gear provided on the input shaft, a parking lock mechanism selectively engaging the parking gear, a change lever mechanically connected to the parking lock mechanism, a speed change actuator for actuating the speed changer to each speed stage, parking operation detecting means provided in an operation route of the change lever from a neutral position to a parking position, and control means. The control means activates the speed change actuator to actuate the speed changer to a predetermined speed stage when the parking operation detecting means detects the change lever being operated in the movement of the lever from the neutral position to the parking position.

Description

TECHNICAL FIELD The present invention relates to a vehicle parking device in which a clutch is cut off when an engine is stopped and rotation of an input shaft of a transmission cannot be prevented by a frictional force of an engine. BACKGROUND ART In a vehicle equipped with an automatic transmission composed of a fluid transmission, a hydraulic pump is driven by an engine to generate hydraulic pressure, and the multi-plate clutch is engaged with the hydraulic pressure to fix the shift speed. Therefore, when the engine stops, it is not possible to generate hydraulic pressure, and when the engine stops, it automatically becomes neutral. For this reason, in a vehicle equipped with an automatic transmission composed of a fluid transmission, it is not possible to control the rotation of the wheels using the frictional force of the engine. For this reason, in vehicles equipped with an automatic transmission composed of a fluid transmission, a parking gear is provided on the output shaft of the transmission, and a parking lock mechanism that selectively engages with the parking gear is provided. Is engaged with the parking gear. However, when a parking gear is provided on the output shaft of the transmission and the parking gear is locked, the maximum output torque of the transmission acts on the parking lock mechanism, which is a very disadvantageous condition in terms of strength. . Therefore, it is difficult to equip a vehicle equipped with an automatic transmission for medium and large trucks with a parking lock mechanism because the parking lock mechanism is not strong enough. On the other hand, even in vehicles using a parallel shaft gear type transmission as the transmission and a hydraulic multi-plate clutch or electromagnetic powder clutch as the clutch, the clutch is cut off when the engine is stopped, so the frictional force of the engine is used. Control the rotation of the wheels I can't do that. Therefore, in this type of vehicle, it is conceivable to provide a parking gear on the output shaft of the transmission and lock this parking gear when parking. However, in a medium-sized or large truck, the parking lock mechanism is used as described above. Does not hold strongly. In order to solve such a problem, Japanese Patent Laid-Open No. 2000-266 discloses a vehicle parking apparatus in which a parking gear is provided on an input shaft of a transmission, and the parking gear is opened when parking. No. 4,178,878. Thus, as described in the above publication, a parking gear is provided on an input shaft of a transmission, and the parking gear is locked in a vehicle parking device in which the parking gear is locked when parking. Prior to that, the transmission must be geared into the required gear. However, when the parking lock mechanism is mechanically connected to the change lever, when the change lever is moved to the parking position during parking, the parking lock mechanism is activated. As a result, the input shaft is locked, so that the transmission cannot be brought into a predetermined gear position. In spite of the fact that the change lever is moved to the parking position during parking, the transmission is in the neutral state, so that the parking is stopped. There is a problem that the lock function does not work. DISCLOSURE OF THE INVENTION An object of the present invention is to provide a parking device for a vehicle in which a transmission is geared to a predetermined gear when a change lever is operated to a parking position during parking. In order to achieve the above object, according to the present invention, there is provided a vehicle in which rotation of an input shaft of a transmission cannot be stopped by frictional force of an engine when the engine is stopped,

A parking gear provided on the input shaft, a parking lock mechanism selectively engaged with the parking gear, and a change lever mechanically connected to the parking lock mechanism for indicating a gear position of the transmission. And a shift actuator that operates the transmission at each shift speed. A neutral position detecting means disposed at a neutral position of the change lever; a parking operation detecting means disposed on an operation path of the change lever from the neutral position to a parking position; a neutral position detecting means; Control means for operating the shift actuator based on a detection signal from the parking operation detection means,

After the control means confirms the neutral position of the change lever based on the detection signal from the neutral position detection means, the operation of the change lever is confirmed based on the detection signal from the parking operation detection means. In this case, the speed change actuator is operated to shift the transmission into a predetermined gear.

A parking device for a vehicle is provided. Regulating means for regulating engagement of the parking lock mechanism with the parking gear, wherein the control means regulates when the operation of the change lever is confirmed based on a detection signal from the parking operation detecting means. Is operated until the transmission shifts into a predetermined gear. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing a vehicle parking device configured according to the present invention. FIG. 2 is an explanatory view showing an operation putter of a change lever constituting a parking device for a vehicle constituted according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a preferred embodiment of a parking device for a vehicle constituted according to the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a vehicle parking device configured according to the present invention. A drive shaft 2 driven by an engine (not shown) such as an internal combustion engine, The input shaft 31 of the transmission 3 is disposed on the same shaft. A hydraulic multi-plate clutch 4 is disposed between the drive shaft 2 and the input shaft 31. The hydraulic multiple clutch 4 may have a conventionally well-known configuration including a clutch outer 41 attached to the drive shaft 2 and a clutch inner 42 attached to the input shaft 31. The transmission 3 is a well-known parallel shaft gear type transmission, and is configured to be geared into each shift speed by a speed change actuator 5. The shift actuator 5 may be a conventionally known one. For example, the shift actuator 5 is composed of a selector actuator 51 and a shift actuator 52 constituted by an electric motor, and is operated by a shift instruction signal from control means described later. Can be The select actuator 51 and the shift actuator 52 are provided with a select position detecting sensor 51 and a shift position detecting sensor 51 for detecting the operating position, respectively. Each sensor sends a detection signal to control means described later. A parking gear 6 is mounted on the input shaft 31 of the transmission 3. The parking gear 6 is adapted to selectively engage with the parking lock mechanism 7. The parking lock mechanism 7 includes a locking member 71 disposed opposite to the outer periphery of the parking gear 6 and supported on a case 32 of the transmission 3 so as to be slidable in the vertical direction in the figure. I have. The locking member 71 has a tooth 711, which engages with the parking gear 6, at the lower end in the figure, and has an actuated inclined surface 712 at the upper end thereof. 2 is inserted into a housing 72 arranged on the upper side of the case 32. The locking member 71 formed in this way is urged upward in the figure by a coil spring 73 disposed between the locking member 71 and the case 32. An operating member 74 for operating the locking member 71 is provided in the housing 72 so as to be slidable in the left-right direction in the figure. The actuating member 74 has an actuated inclined surface 741, which engages with the actuated inclined surface 71, 2 of the locking member 71, and has a through hole 742, which penetrates in the left-right direction in the figure. Have. An operating rod 75 is slidably inserted into the through hole 742 of the operating member 74 formed as described above. A stopper 751 is attached to the right end of the operating rod 75 in the drawing, and a spring receiver 752 is provided on the left side of the operating rod 74 in the drawing from the operating member 74. Have been killed. A coil spring 76 is disposed between the spring receiver 752 and the operating member 74. A push-pull cable 78 that is operated by a change lever 77 is connected to the left end in the drawing of the operating rod 75. Therefore, when the change lever 77 is actuated in the direction indicated by the arrow in the figure, the operating rod 75 is actuated rightward in the figure via the push-pull cable 78, and as a result, the coil spring 76 is actuated. The actuating member 74 is actuated to the right in the drawing. When the operating member 74 moves to the right in the drawing, the locking member 7 1 is engaged with the operating inclined surface 7 41 of the operating member 7 4 and the operated inclined surface 7 12 of the locking member 7 1. The coil spring 73 is moved downward in the figure against the spring force of the coil spring 73, and the teeth 71 1 formed at the lower end thereof engage the parking gear 6. In the illustrated embodiment, the change lever 77 operates in the neutral position (N), the drive position (D), the reverse position (R), and the parking position (P) according to the operation pattern shown in the drawing. I have. Detecting means is provided at each operating position of the change lever 77. That is, the neutral position detecting means 81 is in the neutral position (N), the drive position detecting means 82 is in the drive position (D), the reverse position detecting means 83 is in the reverse position (R), and the reverse position detecting means 83 is in the reverse position (R). The parking position detecting means 84 is disposed at the parking position (P). In the illustrated embodiment, an operating path from the neutral position (N) to the parking position (P), that is, a space between the neutral position (N) and the parking position (P) is formed in the form of a hook. A parking operation detecting means 85 is provided at the bent portion. Each of these detection means sends the detection signal to a control means described later. Further, in the illustrated embodiment, the parking lock restriction for temporarily restricting the movement of the operating member 74 constituting the parking lock mechanism 7 even when the change lever 77 is operated to the parking position (P). An electromagnetic solenoid 9 is provided as a means. A cylindrical casing 91; a fixed yoke 92 made of a magnetic material attached to an end of the casing 91 on the housing 72 side; and the fixed yoke The movable yoke 93 can be moved toward and away from the movable yoke 92, a push rod 94 made of a non-magnetic material with one end attached to the movable yoke 93, the fixed yoke 92 and the movable yoke 93 are surrounded. And a cover member 96 attached to the other end of the casing 91 and covering the movable yoke 93. The electromagnetic solenoid 9 configured as described above is disposed such that the tip of the push rod 94 passes through the housing 72 and faces the right end face in the drawing of the operating member 74. When the electromagnetic coil 95 is urged, the movable yoke 93 is attracted to the fixed yoke 92, and the push rod 94 attached to the movable yoke 93 is moved to the electromagnetic solenoid 9 configured as described above. It moves to the left in the figure to restrict the movement to the right in the figure of the operating member 74. The parking device in the illustrated embodiment includes control means 10. The control means 10 is configured by a microcomputer, and includes a central processing unit (CPU) for performing arithmetic processing according to a control program, a read-only memory (ROM) for storing a control program, and the like, and storing arithmetic results and the like. It has a read / write random access memory (RAM) and a timer. The control means 10 includes the neutral position detecting means 81, the drive position detecting means 82, the reverse position detecting means 83, the parking position detecting means 84, the parking operation detecting means 85, and the select position detecting sensor 51. 1, a shift position detection sensor 5 2 1 and a vehicle speed sensor 11 for detecting the traveling speed of the vehicle, a detection signal from an accelerator sensor 12 for detecting the depression amount of an accelerator pedal (not shown), etc. Control signals are output to the constituent selector actuator 51, shift actuator 52, electromagnetic source 9, and the like. The parking device in the illustrated embodiment is configured as described above, and its operation will be described below.

When the change lever 77 is actuated to the neutral position (N), the control means 10 is based on the detection signal from the neutral position detecting means 81 and the select actuator constituting the shift actuator 5 is provided. A control signal is output to 51 and the shift actuator 52 so as to bring the transmission 3 into the neutral state. Also, When the controller 77 is positioned at the drive position (D), the control means 10 executes automatic shift control based on the detection signals from the drive position detection means 82 and the like. That is, the control means 10 determines the target shift speed based on the detection signals from the vehicle speed sensor 11 and the accelerator sensor 12, and selects the gearbox 51 and the shift gear 51 to shift into the determined target shift speed. Outputs control signal to actuator 52. Next, when the change lever 77 is positioned at the reverse position (R), the control means 10 selects the selector actuator 51 and shift gear based on the detection signal from the reverse position detection means 83. A control signal is output to the actuator 52 to shift the transmission 3 to the reverse gear. Next, a case where the vehicle stops and parks will be described.

When the vehicle stops, the change lever 77 is in the neutral position (N). When the parking device is operated, the engine is also stopped, so the power transmission of the hydraulic multi-plate clutch 4 that is operated by the hydraulic pressure generated by the hydraulic pump operated by the driving force of the engine is cut off. In state. When the change lever 77 is operated toward the parking position (P) to operate the parking device, the parking operation detecting means 85 is turned on in the middle of the operation, and this ON is sent to the control means 10. Based on the ON signal from the parking operation detection means 85, the control means 10 controls the selector 3 which forms the shift actuator 5 to shift the transmission 3 to a predetermined gear (for example, first or second gear). The control signal is output to the actuator 51 and the shift actuator 52. Accordingly, the transmission 3 is in a state of gear-in to a predetermined speed change stage (for example, first speed or second speed). At this time, as described above, since the power transmission of the hydraulic multi-plate clutch 4 is cut off, the input shaft 31 of the transmission 3 is rotatable, so that the gear-in operation is performed smoothly. Then, the change lever 77 further moves toward the parking position (P) as indicated by the arrow, and reaches the parking position (P). Acted upon. As a result, the operating member 74 is actuated rightward in the figure via the coil spring 76, and the operating member 74 is actuated to the actuated inclined surface 741, and the actuated inclined surface 712 of the locking member 71 is engaged. The locking member The tooth 71 1 formed on the lower end of the locking member 71 engages with the parking gear 6 by moving the nut 71 downward by the spring force of the coil spring 73 and moving downward in the figure. In this manner, the engagement of the teeth 71 of the locking member 71 with the parking gear 6 locks the input shaft 31 of the transmission 3 to restrict its rotation. As described above, the transmission 3 is engaged in a predetermined gear (for example, first speed or second speed), and the input shaft 31 of the transmission 3 is locked, so that the transmission 3 is transmitted to the output shaft 33 of the transmission. The rotation of the dynamically connected wheels (not shown) is restricted, and the vehicle is parked. In the illustrated embodiment, when the change lever 77 is operated to the parking position (P), when the parking operation detecting means 85 provided at the key-shaped bent portion is turned on during the operation, the control is performed. The means 10 outputs a control signal to activate the electromagnetic coil 95 of the electromagnetic solenoid 9 to activate the electromagnetic solenoid 9. As a result, the rightward movement of the operating member 74 in the figure is restricted as described above. In this state, when the change lever 77 reaches the parking position (P), the operating port 75 compresses the coil spring 76 via the push-pull cable 78 to move it to the right in the figure. Can be In this way, while the rightward movement is restricted in the drawing of the operating member 7 4., the transmission 3 is operated by the select factor 51 and the shift factor 51 constituting the above-described speed factor 5. The operation of the user 52 ensures that the gear is brought into a predetermined gear (for example, the first or second gear). When the gear-in operation to the predetermined gear (for example, the first or second gear) by the selector actuator 51 and the shift actuator 52 is completed, the control means 10 controls the electromagnetic solenoid. The 9 electromagnetic coils 95 are deenergized. As a result, since the regulation of the operating member 74 is released, the operating member 74 is moved rightward in the figure by the force of the compressed coil spring 76, and the operating inclined surface 7 of the operating member 74 is moved. 4 1 and the engaging member 7 1 engage with the actuated inclined surface 7 1 2, whereby the engaging member 71 is piled up by the spring force of the coil spring 73 and is moved downward in the figure, so that the engaging member is engaged. The teeth 7 1 1 formed at the lower end of 7 1 engage with the parking gear 6. In this way, the electromagnetic solenoid 9 is actuated to temporarily restrict the movement of the operating member 74 until the transmission 3 shifts into a predetermined gear (for example, the first or second gear). Even if the control lever 7 is moved to the parking position (P) at a high speed, after the transmission 3 is brought into a predetermined gear (for example, the first or second speed), the input shaft 31 of the transmission 3 is turned on. Can be locked. It should be noted that whether or not the transmission 3 has shifted into a predetermined gear (for example, first speed or second speed) is determined based on detection signals from the select position detection sensor 5 11 1 and the shift position detection sensor 5 2 1. I do. Next, the case where the operation pattern of the change lever 77 is shown in FIG. 2 will be described. In the operation pattern of the change lever 77 shown in FIG. 2, the drive position (D), the neutral position (N), the reverse position (R), and the parking position (P) are arranged in a straight line. The drive position (D), the neutral position (N), the reverse position (R), and the parking position (P) are respectively provided with drive position detecting means 8 2 as in the embodiment shown in FIG. A neutral position detecting means 81, a reverse position detecting means 83, and a parking position detecting means 84 are provided. As described above, when the reverse position (R) exists between the neutral position (N) and the parking position (P), the shift lever 77 is operated to the neutral position (N) when the vehicle stops. Later, when the change lever 7 is moved to the parking position (P), the vehicle passes the reverse position (R). When the change lever 77 passes through the reverse position (R), the reverse position detecting means 83 is turned on. Based on this ON signal, the control means 10 causes the select actuator 5 which constitutes the shift actuator 5 to operate. A control signal is output to 1 and the shift actuator 52 to shift the transmission 3 to the reverse gear. Therefore, the transmission 3 is geared into the reverse gear and maintains this state. When the change lever 77 is positioned at the parking position (P), the teeth 71 formed at the lower end of the locking member 71 engage with the parking gear 6 as described above, and the input shaft 3 1 Is sucked. If the change lever 77 is not operated to the parking position (P) even after the vehicle stops and the engine key is turned off, it is necessary to delay turning off the parking device for a predetermined time. Then, within a predetermined period, the change lever 77 is operated to the parking position (P), and the select factor constituting the speed change actuator 5 is selected. The power of the parking device is turned off when the transmission 3 is brought into a predetermined gear position by the user 51 and the shift factor 52. If the change lever 77 is not operated to the parking position (P) within the above-mentioned predetermined time, it is desirable to warn with a buzzer or the like. The parking device according to the present invention is configured as described above.

A parking operation detecting means provided on an operation path from the neutral position to the parking position of the vehicle, and when the parking operation detecting means detects the operation of the change lever, the transmission actuator is operated to set the transmission to a predetermined gear position. As a result, the parking gear provided on the input shaft and the parking lock mechanism can be engaged in a state where the transmission is geared into a predetermined gear.

Claims

The scope of the claims

1. The vehicle cannot stop the rotation of the input shaft of the transmission by the frictional force of the engine when the engine is stopped.

A parking gear provided on the input shaft, a parking lock mechanism selectively engaged with the parking gear, and a gear position for instructing a shift speed of the transmission and mechanically connected to the parking lock mechanism; A parking lever for a vehicle, comprising: a change lever; and a shift actuator that operates the transmission at each shift speed.

A neutral position detecting means disposed at a neutral position of the change lever, parking operation detecting means disposed on an operation path from the neutral position to the parking position of the change repeller, and a neutral position detecting means.制御 control means for operating the shift actuator based on a detection signal from the parking operation detection means,

A parking device for a vehicle.

2. A regulating means for regulating the engagement of the parking lock mechanism with the parking gear, wherein the control means is provided when the operation of the change lever is confirmed based on a detection signal from the parking operation detecting means. 2. The parking device for a vehicle according to claim 1, wherein the actuation means operates the restricting means until the transmission gears into a predetermined speed change stage.